“Spooky!” China’s Academy of Sciences Holds World’s First Unhackable Quantum Videoconference

 

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China holds world's first 'unhackable' quantum videoconference in secure communication breakthrough between laboratories in Beijing and Vienna, that could herald the start of a new era of ultrasecure communications that can never be hacked and could revolutionise how humans connect. The Chinese science academy said the encrypted communication system was being tested for potential 'real-world applications. The call was held between President Chunli Bai of Beijing's Chinese Academy of Sciences and President Anton Zeilinger of Vienna's Austria Academy of Sciences, with plans to carry out similar test conversations between someone in China and Singapore, Italy, Germany and Russia.


In quantum physics, entangled particles remain connected so that actions performed by one affects the behavior of the other, even if they are separated by huge distances. Entanglement occurs when a part of particles interact physically, what Einstein referred to as 'spooky action at a distance'. Einstein rejected theory, because it suggested that information could travel faster than light.

 

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Traditional public key cryptography, used in most modern internet communications including emails, usually relies on the perceived computational intractability of certain mathematical functions, while quantum key distribution (QKD) uses single photons in quantum superposition states to provide unhackable security between distant parties.

Technical reasons had previously limited such conversations to distances of a few hundred kilometers, the academy said, but they had found a 'promising solution to this problem' involving a 'sophisticated satellite, named Micius equipped with "a decoy-state QKD transmitter, an entangled-photon source, and a quantum teleportation receiver and analyser."

A ground transmitter beams entangled photons toward China's Micius satellite in space in the image above.(China Academy of Sciences)

The Daily Galaxy via the Chinese Academy of Science

Image credit: With thanks to extremetech.com

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